When space is tight, Fantech's RE Series is the solution with a lightweight
and low profile design. The duct diameters from 6" to 10". RE Series fans
moved a lot of air from one or more venting points. For roof mounting, these
fans are available as either a flat plate or with a roof curb design. RE
Series fans can also be mounted on an exterior wall when roof access is not
suitable. An added benefit is whisper-quiet interior noise levels
(depending on type of installation).

"RE" could stand for "Real Easy" for the Installation

RE Fans are simple to install. No installation extras are required. Simply
mount the fan on the roof or wall. Then connect the electrical supply to the
easily accessible terminal box. The top cover is removable for access to the
motor and wiring connections.